diff --git a/README.md b/README.md
index 72a62cc..7630485 100644
--- a/README.md
+++ b/README.md
@@ -125,12 +125,12 @@ nexttrace --route-path www.time.com.my
 `NextTrace` supports users to select their own IP API (currently supports: `LeoMoeAPI`, `IP.SB`, `IPInfo`, `IPInsight`, `IPAPI.com`, `Ip2region`, `IPInfoLocal`)
 
 ```bash
-# You can specify the IP database by yourself [IP.SB here], if not specified, LeoMoeAPI will be used
-nexttrace --data-provider IP.SB
-## Note that the ipinfo API needs users to purchase services from ipinfo. If necessary, you can clone this project, add the token provided by ipinfo and compile it yourself
+# You can specify the IP database by yourself [IP-API.com here], if not specified, LeoMoeAPI will be used
+nexttrace --data-provider ip-api.com
+## Note that the `ipinfo` and `IPInsight` API needs users to purchase services from them. If necessary, you can clone this project, add the token provided by `ipinfo` or `IPInsight` and compile it yourself
 ## Fill the token to: ipgeo/tokens.go
 ## Please be aware: Due to the serious abuse of IP.SB, you will often be not able to query IP data from this source
-## IPAPI.com has a stricter restiction on API calls, if you can't query IP data from this source, please try again in a few minutes.
+## IP-API.com has a stricter restiction on API calls, if you can't query IP data from this source, please try again in a few minutes.
 ```
 
 `NextTrace` supports mixed parameters and shortened parameters
diff --git a/README_zh_CN.md b/README_zh_CN.md
index c662613..a94ce13 100644
--- a/README_zh_CN.md
+++ b/README_zh_CN.md
@@ -144,25 +144,25 @@ nexttrace --route-path www.time.com.my
 `NextTrace`支持用户自主选择 IP 数据库（目前支持：`LeoMoeAPI`, `IP.SB`, `IPInfo`, `IPInsight`, `IPAPI.com`, `Ip2region`, `IPInfoLocal`)
 
 ```bash
-# 可以自行指定IP数据库[此处为IP.SB]，不指定则默认为LeoMoeAPI
-nexttrace --data-provider IP.SB
-## 特别的：其中 ipinfo API 需要从 ipinfo 自行购买服务，如有需要可以 clone 本项目添加其提供的 token 自行编译
+# 可以自行指定IP数据库[此处为IP-API.com]，不指定则默认为LeoMoeAPI
+nexttrace --data-provider ip-api.com
+## 特别的：其中 `ipinfo` 和 `IPInsight` API 需要从这些服务商自行购买服务，如有需要可以 clone 本项目添加其提供的 token 自行编译
 ##        TOKEN填写路径：ipgeo/tokens.go
 ## 特别的：对于 `Ip2region`, `IPInfoLocal`
 
 ## 另外：由于IP.SB被滥用比较严重，会经常出现无法查询的问题，请知悉。
-##      IPAPI.com限制调用较为严格，如有查询不到的情况，请几分钟后再试。
+##      IP-API.com限制调用较为严格，如有查询不到的情况，请几分钟后再试。
 ```
 
 `NextTrace`支持使用混合参数和简略参数
 
 ```bash
 Example:
-nexttrace --data-provider IPAPI.com --max-hops 20 --tcp --port 443 --queries 5 --no-rdns 1.1.1.1
+nexttrace --data-provider ip-api.com --max-hops 20 --tcp --port 443 --queries 5 --no-rdns 1.1.1.1
 nexttrace -tcp --queries 2 --parallel-requests 1 --table --route-path 2001:4860:4860::8888
 
 Equivalent to:
-nexttrace -d IPAPI.com -m 20 -T -p 443 -q 5 -n 1.1.1.1
+nexttrace -d ip-api.com -m 20 -T -p 443 -q 5 -n 1.1.1.1
 nexttrace -T -q 2 --parallel-requests 1 -t -R 2001:4860:4860::8888
 ```